Method of making shank-stiffeners



. BAHTELS.

METHO I'NG SHANVK STIFFENERS.

AP FILED DEc.3o,1919,

Patented Dec. 21, 1920.

NITED s'mTI-:s

REINHARD E. BARTELS, F LYNN, MASSACHUSETTS.

METHOD OF MAKING SBK...

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To all ywhom t may concern:

Be it known that I, REINHARD lil. Ban'rnns, a citizen ot the UnitedStates, residing at Lynn, in the county of Essex and State ofMassachusetts, have invented new and useful improvements in Methods ofMaking Shank-Stiffeners, of which the following is a specification. l

rlhis invention has for its object to provide a shank stid'ener,especially for turn shoes which will preserve the shape of the shoe,andl also serve as an arch support.

@n the accompanying drawing Figure l represents in longitudinal sec-;ion, a turn. shoe provided with a counter ;tiii"ener embodying theinvention.

llig. 2 shows the blank from which the stii'ener is formed.

Figs. 3, l and 5 show the metal strip/prior 1o its attachment to theblank.

' Fig. 6 illustrates the strip as being secured :o the blank.

Fig. 7 illustrates the nished shank stiftn mer.

Fig. 8 shows instrumentalities which may )e employed for simultaneouslymolding the )lank and the'metal strip.

The body of the stidener may be made of eather or any other semi-iexiblematerial, :uch as leather board, fiber board, or the ike. llt is cutinto blanks l0, which.are Lpproximately in shape like the rear porion ofthe sole of Ithe shoe, for it is cusomary, in the maiifauture of turnshoes, ;o employ a stifener which is inserted in )lace after the shoe isturned and before he heel is secured in place, so that the heel-Ittaching nails will be clenched in the stiffiner and hold it in place.The blank covers he heel seat, and extends forwardly to the ibreak ofthe sole indicated at a. The iorward end of the blank is secured in.place y one or more fastenings b. The blank ils kived as at 11 along itsmargin, and, if of eather, its grain side is uppermost. ired, it may bePskived only at its forward end almost to the break a. By suitable dies,

.his strip is formed with a concavo-convex Iib 13,A which extends fromone side edge .to he .other and which Haras outwardly at itsSpecification ofLettcra Patent.

Application led December 30, 1919. erial No. 348,309.

Patented Dec. 2i, 1926.

ends to leave the strip with dat end portions 14, le. lin the hat endsare formed sharp or acute triangular prongs l5, 15, which may be driveninto the sti'ener blank and clenched if desired. For turn shoes, eachstrip may have two prongs at each end, but tor McKay shoes, a singleprong may be formed at eachv end.

After the blank l() and the metal strip l2 haye been provided, they areassembled, in any suitable machine, in the proper relation with theconcave tace ot the rib against theI :tace oit the blank, and the prongsare driven into the blank at the smaller end thereof, so as to securethem permanently together, 'llhen the partially ormed'dat shank stili'-ener, with the body thereof in a moistened condition it desired, isplaced between molds lo., l?, and is subjected to heavy pressure so assimultaneously to mold them into the shape shown in Fig. 7, and also toforce the other prongs into theheel end of the blank. The blank and thestrip are curved longitudinally of their length, the side edges of themetal 'strip being longitudinally4 curved, and the center ot the rib,between the end portions of the strip, being also curved but on a longerradius than the side edges. When the stidener is completed, it

is placed in a turn shoe, as shownin Fig. 1,

with the rib resting upon the sole, between the seams uniting the upperand sole. The body of the stidzener is not curved transversely of itslength, but is longitudinally curved as shown, and the edges of the ribbear against the under 'ace thereof. The rib-formation of the stripprevents `the body from bending or straightening out under pressure,A,and provides a sti unyielding su port for the arch of the foot.

t is evident that, if desired, the metal strips may be galvanized or maybe japanned or enameled as desired, to prevent them from rusting. Afterthe shank stiffener is placed in the shoe, it is covered with the usualsock lining.

Insimultaneously molding the blank and the metal strip into theuinalform, the mold may also impress in the upper face of the blank, numeralsor letters to indicate thev size and style of the blank. Of course, theprongs may be located at any convenient point or points in the length ofthe strip to i secure the strip `to the blank.

'g l g 1,362,835

What I claim is: A method of making shank stieners, which consists inmolding a metal strip with a longitudinal concavo-convex rib, assem- 5bling said strip and a semi-lexble blank, with the concave face of thestrip against the` face of the blank, and thenv simultathereof.

In testimony whereof I have affixedY my signature.

REINHARD E. BARTELS.

